West Control Solutions KS 42-1 - Manual (Page 16)

3.5.5 Acknowledgement procedures in case of unsuccessful self-tuning
1. Press keys
Ù and È simultaneously:
The controller continues controlling using the old parameters in automatic
mode. The Err LED continues blinking, until the self-tuning error was
acknowledged in the error list.
2. Press key
Ò (if configured):
The controller goes to manual mode. The Err LED continues blinking,
until the self-tuning error was acknowleged in the error list.
3. Press key
Ù :
Display of error list at extended operating level. After acknowledgement
of the error message, the controller continues control in automatic mode using
the old parameters.
Cancellation causes:
r page 13: "Error status self-tuning heating ( ADA.H) and cooling ( ADA.C)"
3.5.6 Examples for self-tuning attempts
(controller inverse, heating or heating/cooling)
Start: heating power switched on
Heating power Y is switched off (1).
When the change of process value X
was constant during one minute (2),
the power is switched on (3).
At the reversal point, the self-tuning
attempt is finished and the new para-
meter are used for controlling to
set-point W.
Start: heating power switched off
The controller waits 1,5 minutes (1).
Heating power Y is switched on (2).
At the reversal point, the self-tuning
attempt is finished and control to the
set-point is using the new parameters.
Operation
Self-tuning 16 Operating KS4x-1
t
2
100%
Y
0%
X
W
Start r 1 3 t reversal point
blinks
t
100%
Y
0%
X
W
start r 1 2 t reversal point
blinks